ALSA: usb-audio: Kill timer properly at removal

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Summary

CVECVE-2025-38105
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-07-03 09:15:23 UTC
Updated2026-06-01 17:16:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Kill timer properly at removal The USB-audio MIDI code initializes the timer, but in a rare case, the driver might be freed without the disconnect call. This leaves the timer in an active state while the assigned object is released via snd_usbmidi_free(), which ends up with a kernel warning when the debug configuration is enabled, as spotted by fuzzer. For avoiding the problem, put timer_shutdown_sync() at snd_usbmidi_free(), so that the timer can be killed properly. While we're at it, replace the existing timer_delete_sync() at the disconnect callback with timer_shutdown_sync(), too.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c88469704d63787e8d44ca5ea1c1bd0adc29572d 06513dd6d32c37d0364db8488cfdf3e14da238a8 git Not specified
CNA Linux Linux affected c88469704d63787e8d44ca5ea1c1bd0adc29572d efaf61052b8ff9ee8968912fbaf02c2847c78ede git Not specified
CNA Linux Linux affected c88469704d63787e8d44ca5ea1c1bd0adc29572d 647410a7da46067953a53c0d03f8680eff570959 git Not specified
CNA Linux Linux affected c88469704d63787e8d44ca5ea1c1bd0adc29572d c611b9e55174e439dcd85a72969b43a95f3827a4 git Not specified
CNA Linux Linux affected c88469704d63787e8d44ca5ea1c1bd0adc29572d 62066758d2ae169278e5d6aea5995b1b6f6ddeb5 git Not specified
CNA Linux Linux affected c88469704d63787e8d44ca5ea1c1bd0adc29572d 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 git Not specified
CNA Linux Linux affected 2.6.14 Not specified
CNA Linux Linux unaffected 2.6.14 semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.167 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.111 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.52 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.3 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/647410a7da46067953a53c0d03f8680eff570959 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c611b9e55174e439dcd85a72969b43a95f3827a4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/62066758d2ae169278e5d6aea5995b1b6f6ddeb5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/06513dd6d32c37d0364db8488cfdf3e14da238a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/efaf61052b8ff9ee8968912fbaf02c2847c78ede 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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